App that contains audio files, how to handle it? Server hosting?

I have a big noob question about something I was wondering about, if I wanted to make an app where you listen to stories, I did figure that you wouldnt be able to realistically fit them all inside the app, the size would add up fast…

So what kind of server hosting would a newbie with not much money be going for? I'm guessing people constantly downloading your audio files won't be cheap ….